Skip to content

    Your body mass index (BMI)camera.gif and waist sizecamera.gif affect your risk of type 2 diabetes, high blood pressure, high cholesterol, and coronary artery disease. The following table shows the risk.

    Body mass index (BMI) and the risk for diseases 1
    Classification BMI Waist size and relative risk

    Men: less than 40 in. (102 cm)

    Women: less than 35 in. (88 cm)

    Men: 40 in. (102 cm) or more

    Women: 35 in. (88 cm) or more

    Normal 18.5-24.9 - Increased risk
    Overweight 25-29.9 Increased risk High risk
    Obesity I 30-34.9 High risk Very high risk
    Obesity II 35-39.9 Very high risk Very high risk
    Obesity III (extreme) 40 or above Extremely high risk Extremely high risk

    For Asian people, each risk category may include lower BMIs than those listed in the table.

    A BMI under 18.5 is considered unhealthy. There is risk that you are not getting sufficient nutrition (malnutrition). Complications of malnutrition include anemia, nutrient deficiency, heart irregularities, loss of menstrual periods in women (amenorrhea), cavities, and osteoporosis.

    WebMD Medical Reference from Healthwise

    Healthy Recipe Finder

    Browse our collection of healthy, delicious recipes, from WebMD and Eating Well magazine.

    Top searches: Chicken, Chocolate, Salad, Desserts, Soup

    Heart Rate Calculator

    Ensure you're exercising hard enough to get a good workout, but not strain your heart.

    While you are exercising, you should count between...